Typewriting machine



May 22, 19 28. Re, 16,973

J- LINDBURG TYPEWRITING MACHINE Original Filed March 21, 1924 AHA/M M I 49 24 JI-P -l 3i lnvemor:

- Affar e y.

Reissued May 22, 1928.

UNITED, STATES PATENT OFFICE.

JOSEPH LINDBURG, OF BROOKLYN, YORK, ASSIGNOR '10 UND-ERWOOD ELLIOTT FISHER COMPANY, OF NEW YORK, N. Y., A. CORPORATION OF DELAWARE.

TYPEWRITING MACHINE.

, Original No. 1,600,235, dated September 21, 1926, Serial No. 700,809, filed March 21,1924. Application 101- I reissue fi1ed May2 7, 1927. Serial No. 194,831.

This invention relates to improvements in card-holdingvbars for use on platens of type writing machines for holding the leading edge of a card to the platen.

5 One of the objects of the invention is to improve and simplify means for attaching and IOCkiIlg the card-holding bar to platens of :usual construction, and for unlocking the sameby a simple motion of the hand.

will herethe platen after it has been revolved into a position having the card-holding bar at the top thereof with the attaching means ,un-

locked and the bar lifted from the surface oftheplaten. I H l "i U 11 designates the platen of a typewriting machine, which ismounted on the shaft 12 thereof by means of end disks 13, which are secured to the platen. The disks 13 have thereon the usual hubs 14 to fit'the'shaft 12, to which said hubs maybe secured in any suitable manner. a

Each of said disks 13 is alsofprovided at the periphery thereof with pin-shaped teeth 15 to fit circular apertures 16 in the main body of the card-holding bar 17 near the ends thereof. f

The card-holding bar 17 is shown in Figures 2 and 3 as curved transversely thereof to fit the surface of the platen 11, and the ures 1 and 2 as having therein a groove 18, to receive the leading edge of a;.card on theplaten 11.

The ends of said bar 17 extend beyond the disks 13 and terminate in thesides 19, which extend at right angles to the main body of the bar 17 towards thecenter, of the platen. Thesides 19 of said bar 17 have therein the a 1, slots 20 to straddle the hubs '14 of said disks Another feature is the provision of means front edge of said bar 17 is shown in Fig- Y 13, which hubs 141 are thereby made to cooperate with said teeth 15 to keep the bar 17 in position on the surface of the platen 11.

To prevent the sides 19 of the bar '17 from being displaced outwardly in a radialdirection with relation to the platenll, thereby lifting the bar 17 therefrom, locking arms or latches 21'are provided which arepivotallyconnected at 22 to the sides 19 of thebar 17, each at apoint near the periphery of the platen 11. I Said latches 21 terminate in hooks 23, to embrace two hubs 14 on the sides thereof remote from and at points thereof substantially opposite to the main body of the-bar 17 andthe connections thereof withsaid teeth 15, as hereinbefore de scribed.

To prevent accidental displacement of said latches 21, springs '24areprovided, which are shown as connected each at one end thereof to a pin 25 on said latches, and at the other end to a pin 26 on said sides 19,.

To lift the bar 17 from the surface of the platen 11 preliminary-to removing the bar therefrom, cams 27 ar'eprovided on extensions 28 of said latches 21 near the inner ends of said hooks 23.. By turning said latches 21 on theirpivots 22 in a clockwise direction in Figure 2, the cams 27 are brought into engagement with the periphery of the hubs 14:, thereby causing the pivots 22 to move the bar 17 on said teeth15 in a radial direction with relation to the platen, thereby disengaging the bar 17 from said teeth, and a continued motionof said cams 27, lifts thebar 17 to a, position such as shown in Figure 3, when it may conveniently be removed fromlthe platen, if necessary. The teeth 15, to fit the apertures 16, are provided all around the periphery of the end disks 13, whereby the bar 17. may be conveniently attached toany part of the platen and locked into position thereon by.

said latches 21, as hereinbefore described.

To limit the outward swinging of the latches 21 on their pivots 22 when removingthe bar 17 from the platen 11, stops 29 are provided on said latches 21 to ,be in-v tercepted by the pins 26, as shown in Figure 3.

At Figure 2 the lock is held effectively" closed by means of the spring 24. Releasing movement of the latch (eifected by its fingerpiece 30) is opposed by the tension of said whereby the bar is secured to the platen.

4. The combination of aplaten of a type- Writing machine, a card-holding bar terminating at its end in aside extendlng substantially at right angles to the main body thereof. a slot in said side radially disposed with relation to said platen, a cyllndrical portion extending coaxially with-said platen to fit said slot, means for co-operating with said portion in. said slot to detachably connect said bar to the platen, and a cam pivotally connected to said side to react on said portion, thereby displacing said side radially with relation to said platen, and thereby lifting the main body of said bar from the surface of the platen.

5. The combination of a platen of a typewriting machine, a card-holding bar terminatin at its end in a side extending substantially at right angles to the main body thereof, a slot in said sideradially dis osed with relation to said platen, a cylin rical portion extending coaxially with said platen to fit said slot, means for cooperating with said portion in said slot to detachably connect said bar to the platen, a latch to prevent accidental displacement of said side in a radial direction with relation to said platen, pivotally connected to said side, and a cam onsaid latch to react on said portion when opening said latch, thereby displacing said latch radially "with relation to said platen, and thereby lifting themain body of said bar from the surface of the platen.

6. In a typewriting machine, the combination with a revoluble platen, of a cardholding bar extending therealong, the ends of the bar being turned inwardly toward the platen-shaft adjacent the ends of the platen and formed with forks for engage-V ment around said platen-shaft, and releasable hooks pivoted to said ends of the bar for engagement around the platen-shaft between the tines of the forks, whereby to secure the bar to the platen-shaft, said" hooks each including a cam co-acting against the platen-shaft during the act of releasing the bar from the platen, whereby the cams raise the bar from the platen.

7 The combination of a platen of a typewriting machine, a pair of end disks secured to the platen, hubs on said disks at the center thereof, pin-shaped teeth on the 'eriphery of each of said disks, a card-ho ding bar to fit the surface of the platen, a air of apertures in the main body of said ar, interchangeably to engage said teeth, the

ends of said bar terminating in sides extending substantially at right angles to the main body thereof, and slots in said sides radially disposed with relation to said disks and said platen, to fit said hubs, thereby cooperating with said teeth in said aperturesto detachably connect said bar to the platen.

8. In aftypewriting machine," the combination with a platen, of a card-holding bar extendingalong the platen, the ends of said bar being turned inwardly toward the platen-shaft, adjacent the ends oif the platen, and releasable means for Securing said ends to the platen-shaft, said means including a cam engageable with said platenshaft, whereby, upon actuating said securing means to release the bar, the cam is effective to raise the bar from the platen.

9. In a typewriting machine, the combi nation with a platen, of a card-holding bar extending along the platen and having a perforation therein, a series of pins disposed around the platen and engageable selectively with said perforation for holding the platen against angular displacement, and releasable means for securing the bar to the platen'including a cam engageable with the platen, whereby, upon actuat- .the bar from said selective holding means during the act of releasing the bar from the platen.

11. Mechanism as set forth in. claim 4, in which said connecting means includes a spring, said cam operating against the tension of said spring.

12. Mechanism as set forth in claim 4, in which 'said connecting means includes a sprlng, said cam operating against the tension of said spring, a finger-piece upon the cam capable of swinging the cam to bring the spring to dead position, and a stop to arrest said cam with the spring in said dead position and with the cam resting upon the side of the crown of said cylindrical portion.

'13. In a typcwriting 1nach.ine,the combination with'a revoluble platen, of a cardholding bar extending along the platen and having ends extending inwardly and supported by the platen-shaft, one of said ends being forked to 'bestride theplaten-shaft, a spring, and locking means holdable in idle open position by the spring, but operable by pressure applied upon the end of said bar in resting upon the sideof the crown of the platen-shaft, end so that pressure upon the bar, is efl'ecti-ve upon the cam to cause it to work oif from the platen-shaft and bring said spring to active position to close the hook ground the shaft.

15. In e typewriting machine, the combination with a revoluble platen and its sheft, of a work-holding bar extending along the platen and means securin the bar at its end to the platen, including an oak device to hook under the platen-shaft, a spring to hold said lock closed, and means to cock said device in open position, said locking device being releasable from its cocked position by pressure applied upon the end of the bar to res; it in a direction towards the platen-suit, and said spring being effective to efl'ect the locking engagement of the released locking device to the platen-shaft.

JOSEPH LINDBURG. 

